Linked from
The 8 pages that link to One-carbon metabolism, each with the reason it gives.
CholineRelated: Choline-derived betaine supplies methyl groups to this network.
SerineRelated: Serine is a major donor of one-carbon units through folate-dependent reactions.
Vitamin B6Related: A B6-dependent reaction supplies one-carbon units from serine and glycine.
B vitaminsRelated: Folate carries one-carbon units used to make nucleotides and support methylation.